Electromagnetic wave-signaling system



Aprig 2? 1926 31,582,524

M. LATOUR ELECTROMAGNETIC WAVE SIGNALING SYSTEM Filed July 15, 1920 Patented Apr. 27, 1926.

UNITED. STATES PATENT OFFICE.

MARIUS LATOUR, OF PARIS, FRANCE, ASSIGNOR TO LATOUR' CORPORATION, OF J EIL- SEY CITY, NEW JERSEY, A CORPORATION OF DELAWARE.

ELECTROMAGNETIC WAVE-SIGNALING SYSTEM.

Application filed July 15, 1920. Serial No. 396,502.

(GRANTED UNDER THE PROVISIONS OF THE ACT OF MARCH 3, 1921, 41 STAT. In, 1313.)

To all whom it may concern:

Be it known that I, MARIUs LATOUR, citizen of the Republic of France, residing in Paris, in the Pepublic of France, have invented certain new and useful Improvements in lllectromagnetic \Vave-Signaling Systems (for which I have filed applications in Germany, July 1, 1920; Belgium, June 29, 1920; France, Dec. 16, 191,8; Denmark, June 22, 1920; Poland, July 8, 1920; Sweden, June 28, 1920; Czeclmslovalcia, July 10, 1920), of which the following is a specification.

The present invention relates to the regulation of high frequency currents such as those utilized in wireless telegraphy.

The object of the present invention is to avoid breaking the circuit through which the high frequency current itself flows when it is desired to control the sending of high frequency signals in accordance with the Morse code.

One method already known comprises the connection in a high frequency circuit, such as an aerial circuit, of an inductance having its magnetic circuit composed of iron, and in adjusting the value of the IOHCUIUCG by more or less saturating its magnetic circuit. To carry out this saturation an arm:- iliary circuit is employed, fed either by continuous current it it is desired to control the emission by means of any type of signaling her or by low frequency alternating current if it is desired to obtain high frequency transmission varying according to an audible note.

in the present invention the same result is obtained the variation of the reluctance of the magnetic circuit being eficcted by purely mechanical means, by the displacement of a part of this magnetic circuit and without the employment of any auxiliary exciting winding or in a general manner without any movable winding.

With this object, according to the invention a coil through which the high frequency current flows can be arranged one magnetic circuit having its air gap adjustable in any known manner.

Further these conditions can be satisfied as described in my previous specifimtion No. 1,330,638, by using a machine comprising a stator having a single winding traversed by high frequency current and a toothed rotor without windings, the func tion of the said rotor being to vary the total reluctance of the magnetic circuit. By connecting the stator winding in the high frequency circuit to be controlled and by a suitable regulation of the speed, a high frequency emission is obtained modulated according to a musical frequency.-

Although the two methods above described eti'ect the same object, other methods can be employed according to the present invention, which are hereinafter described with reference to the accompanying drawings in which: 7 I

Fig. 1 is a view in perspective of one method of carrying out the invention.

Figs. 2, 3 and 4, show in side elevation, front elevation and plan respectively a second method.

In Fig. 1, an inductance is shown comprising a winding 5 through which flows the high frequency current and arranged on a magnetic core 1 provided with an air gap. This air gap is variable in the sense that it is provided with magnetic projections or teeth 2 and corresponding interteeth spaces. A movable armature 3 is arranged in the air gap and is made up of alternately arranged electrically conducting and non-conducting parts.

The mode of operation is as follows When the conducting portions of the movable armature are opposite the projections 2, the conducting portions act as a screen to the flux and the reactance is a minimum. \Vhen the non-conducting parts 4 are opposite the projections 2 the effect of the screen is reduced and the reactance is a maximum. By a rapid movement from one to the other of these two positions, the reactance of the coil can be modified in very large proportions.

In the arrangement of Figs. 2, 3, and 4-, the stationary parts are analogous to those described in Fig. l but the movable part instead of being in the form of a plate and given a sideways movement'fis formed of a disc having its periphery alternately composed of electrically conducting and nonconducting sectors. The disc is adapted to berotated on an axis which in the case of emissions modulated to an audible frequency, allows rotation by means of a small be of the open type in which case the winding is arranged as near as possible to that extremity of the core near which the mov able armature is mounted to rotate.

The core and other magnetic parts of the device are with advantage formed of a paramagnetic metal finely divided in the direction of the lines of force such as laminations, wire and the like. Additionally the device may beimmersed in oil ifit is desired to reduce the heating of the movable part. The operation of this movable part can-be controlled by a relay of any type which is not shown and does not constitute a part of the invention.

I declare that what I claim is 1. In. a regulating inductance for, high frequency currents, a U-shaped magnetic core, a windingon said core, and a movable armature adapted to be moved by means of an outside force, said armature being formed of alternately arranged electrically conducting and insulating parts.

2. In a regulating inductance for. high frequency currents, a U-shaped magnetic core having an air-gap, projections on said core extending into said air-gap, a Winding on said core and a movable armature adapted to be moved by means of an outside force, said armature being formed of alternately arranged electrically conducting and insulating parts.

3. In a regulating inductance for high frequency currents, a U-shaped magnetic.-

core provided with an air-gap, projections on said core'extending into said air-gap, a winding on said core and an armature adapted to rotate about an axis within said air-gap by means of an outside force, said armature being in the form of a disc with its periphery alternately arranged conducting and insulating parts.

4. In a regulating inductance for high frequency currents, a U-shaped core of magnectic metal formed of a plurality of laminations and comprising a magnetic circuit having an irregular air-gap, a winding on said core, and an armature movable within said air-gap by means of an outside force, said armature being formed of alternately arranged conducting and insulating portions 5. In a high frequency system, means including an inductance having a magnetic core, the method of varying high frequency current which consists in supplying high frequency'current to said inductance, and mechanically varying thereluctance' of the magnetic core periodically.

6. In a controlling inductance for high frequency currents including a magnetic core'having an air-gap, a winding on said core through which the-high frequency currents flow, and an armature comprising spaced electrically conducting portions movable to cut the magnetic flux and driven by an outside force for periodically varying the reactance of 'said core and air-gap.

7. In a regulating inductance for high frequency currents, a magnetic core, a winding on said core and a movable armature adapted. to be moved by means of an outside force, said armature being formed of alternately arranged electrically conducting and insulating parts.

8. In a regulating inductance for high frequency currents a magnetic core having an air-gap, a winding on said core and a movable armature adapted to be moved by means of an outside force, said armature being formed of alternately arranged electrically conducting and insulating parts.-

9. In a-regulating inductance for high frequency currents, a magnetic core having an air-gap, projections on said core extending into said air-gap, a Winding on said core and a movable armature adapted to be moved by means of an outside force, said armature being formed .of alternately arranged electrically conducting and insulating parts.

10. In a regulating inductance for high frequency current, a magnetic core with an air-gap projections on said core extending into said air-gap, a winding on said core and an armature adapted to rotate about an axis within said air-gap by means of an outside force, the said armature being in the form of a disc with its-periphery alternately conducting and insulating parts.

11. In a regulating inductance for high frequency current, a core of magnetic metal formed of a plurality of laminations and comprising a magnetic circuit having an irregular air-gap, a winding on said core, and an armature movable withinfsaid air-gap by means of an outside force, said armature being formed of alternately arranged conducting and insulating portions.

In witness whereof, I have hereunto signed my name. 

